Complete design verification suite for spur and helical cylindrical gears per GB/T 3480. Seven modules covering geometry calculation, transmission parameter checks, contact fatigue strength, bending fatigue strength, and backlash inspection.
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d1 = m · z1 / cos(β)
a = (d1 + d2) / 2
εγ = εα + εβ
σH = ZH · ZE · Zε · Zβ · √(KA·Ft·(u+1)·Kv·KHβ·KHα / (b·d1·u))
σF = KA · Ft · Kv · KFβ · KFα · YFS · Yε · Yβ / (b · m)
Wn = cos(α) · [π·(k-0.5) + z·inv(α)] · m
Geometry, parameter checks, contact fatigue, bending fatigue, and backlash inspection — all in one comprehensive calculator.
Calculations follow the Chinese national standard for cylindrical gear load capacity verification.
Built-in material database with σHlim, σFlim, and heat-treatment-dependent properties.
Tooth form factor YFS computed via 18×29 bilinear interpolation table, no manual lookup.
Involute function inv(α) = tan(α) − α solved via Newton iteration, no lookup table needed.
Instant judgment on contact and bending stress against allowable limits for pinion and gear.
Input power P, pinion speed n1, gear ratio u, mesh type, materials, quality grade, precision grade, reliability.
Calculate z1, z2, m, β, d1, d2, center distance a, addendum/dedendum, contact ratios εα/εβ/εγ.
Compute contact stress σH and bending stress σF, compare with allowable σHP/σFP.
Calculate span measurement teeth k, common normal length Wn, chord tooth height/thickness for manufacturing.
Enter your design parameters and get instant verification across all 7 modules.
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